USING WGET TO RETRIEVE FILES
Unfortunately, browsers can suffer problems downloading files. This can be aggravated by conditions on the server, so while the proper fix is probably on the server, there are alternative means to download files which effectively overcome the problems. For a good discussion of the problem and some solutions, see here.
I recommend the WGET utility. After downloading WGET, go to the directory you downloaded it to and unzip the binary you downloaded. Open a command prompt window and go to that directory. Next, right-click on the file you want to download from Alachuaclasses and select "copy link location". Then in the command prompt window type "wget " and use "edit", "paste", to paste in the link, like so:
wget http://www.alachuaclasses.com/classesMay2010/file_info/download1.php?file=KrishnaBalaramDay1.mp3
and press ENTER. That's it, the file will download, and it's quite bullet-proof.
What, you're not comfortable with command line utilities (they're so last century) ? Then Google on "GUI interface for WGET", there are a number of them out there.
The web hosting provider seems to have fixed the problem, but if you do have the problem, this will allow you to grab those large files.